CN109835933A - A kind of silver nitrate catalyst devil liquor recovery utilizes technique - Google Patents
A kind of silver nitrate catalyst devil liquor recovery utilizes technique Download PDFInfo
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- CN109835933A CN109835933A CN201711206438.5A CN201711206438A CN109835933A CN 109835933 A CN109835933 A CN 109835933A CN 201711206438 A CN201711206438 A CN 201711206438A CN 109835933 A CN109835933 A CN 109835933A
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- silver
- nitrate
- calcium nitrate
- water
- silver nitrate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
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Abstract
A kind of silver nitrate catalyst devil liquor recovery utilizes technique, include the following steps: with pure mass ratio 1: 0.47~1.03 to react on waste silver catalyst and its carrier waste residue and nitric acid solution in corrosion resistant reactor, the mixed solution of silver nitrate and calcium nitrate is generated, filtering obtains the clear filtrate of silver nitrate and calcium nitrate；The clear filtrate of silver nitrate and calcium nitrate is sent into vacuum distillation device and is evaporated under reduced pressure, cooling, Crystallization Separation is ejected when being condensed into saturated solution, what is be precipitated first is silver nitrate, and nine water calcium nitrate crystal are precipitated later, it is washed again, dry, obtain nine water calcium nitrate crystal and nitric acid silver products；Nine water calcium nitrate crystal of acquisition are sent into drying box to be heated to being heated to 68~72 DEG C of drying, obtain six water nitric acid calcium products through cooling packing.The present invention prepares silver nitrate and six water calcium nitrate using waste silver catalyst and its carrier waste residue as raw material, turns waste into wealth, and creates considerable economic benefit for enterprise.
Description
Technical field
The present invention relates to the comprehensive treatments of petroleum organic chemical industry's deep processing dead catalyst and the technical field utilized, especially
It is related to a kind of silver nitrate catalyst devil liquor recovery and utilizes technique.
Background technique
Ethylene method is ethylene and air or oxygen in the presence of silver catalyst, and direct gaseous oxidation generates epoxy
Ethane is absorbed to form condensed fluid with water by absorption tower, the ethylene of non-oxidation reaction be recirculated back to flow in reactor after
Continuous reaction, for cyclic absorption until being completely formed ethylene oxide liquid, absorbing liquid obtains ethylene oxide finished product through desorbing rectifying.
In this oxidation reaction most important link be exactly with catalyst silver come rise catalysis reaction, and silver and get along well the inside
Any substance reacted, so the effect of catalyst silver is irreplaceable.The cost of catalyst silver is used due to the above reasons,
Be it is very high, fall again as waste discharge after the completion of the catalytic action, it is not only uneconomical but also not environmentally.Therefore it studies and opens
Catalyst silver or other catalyst are sent out, being allowed to turn waste into wealth is very important, timely, essential.
Its discharge amount of ethylene method silver catalyst is to produce product per ton to be discharged 0.0002 ton, that is, produce per ton
Product discharges 0.2 kilogram, and there are also three oxidation dicalcium carrier mixing, abbreviation calcium soil for the inside.Wherein the content of catalyst silver is 15%,
Remaining is entirely three oxidation dicalcium.
The present invention is exactly to utilize silver nitrate catalyst devil liquor recovery using technique, creates economic benefit for enterprise.
Summary of the invention
The technical problem to be solved by the present invention is to, silver catalyst and its carrier waste residue are handled, comprehensively utilized, system
Standby silver nitrate and six water calcium nitrate provide a kind of silver nitrate catalyst devil liquor recovery using technique, and this method is effectively utilized
Waste silver catalyst prepares the value products such as silver nitrate and calcium nitrate, not only creates economic value, but also eliminate pollution.
The technical solution adopted by the present invention to solve the technical problems is: a kind of silver nitrate catalyst devil liquor recovery utilizes work
Skill includes the following steps:
1) by waste silver catalyst and its carrier waste residue (in terms of silver oxide) and nitric acid solution with pure mass ratio 1:0.38~
1.42 react in corrosion resistant reactor, start blender, are chemically reacted, and reaction generates the mixed of silver nitrate and calcium nitrate
Solution is closed, filtering obtains clear filtrate and a small amount of impurity filter cake of silver nitrate and calcium nitrate, impurity filter cake is sent to burning
Or it buries；
2) the clear filtrate of the silver nitrate of above-mentioned acquisition and calcium nitrate is sent into vacuum distillation device and is evaporated under reduced pressure,
Cooling, Crystallization Separation is ejected when being condensed into saturated solution to be precipitated first according to the difference of silver nitrate and calcium nitrate freezing point
It is silver nitrate, nine water calcium nitrate crystal is just precipitated according to nine crystallization waters that conversion evaporation reaches calcium nitrate later, through converting
If water shortage can be filled to the amount of nine crystallizations water, then washed, dry, nine water calcium nitrate crystal of acquisition and silver nitrate
Product；
3) nine water calcium nitrate crystal of above-mentioned acquisition are sent into drying box and are heated to 68~72 DEG C of drying, nine water calcium nitrate lose
It goes three crystallizations water to become six water calcium nitrate, obtains six water nitric acid calcium products through cooling packing.
Main chemical reactions equation of the invention are as follows:
3Ag+4HNO3=3AgNO3+2H2O+NO
Al2O3+6HNO3+9H2O=2Al (NO3) 36H2O
The beneficial effects of the present invention are: this method is effective first, a kind of silver nitrate catalyst devil liquor recovery utilizes technique
The material composition of silver catalyst and its carrier waste residue is utilized, silver catalyst and its carrier waste residue are handled, comprehensively utilizes,
Prepare silver nitrate and six water calcium nitrate.Second, silver nitrate and six water calcium nitrate purposes are wide, it is two kinds of biggish productions of economic value
Product improve the economic benefit of processing silver catalyst and its carrier waste residue, create very big profit return, be that chemical industry is comprehensive
Close the model for administering and utilizing.Third, small investment, prepares silver nitrate and six water nitric acid to processing silver catalyst and its carrier waste residue
Calcium is especially suitable, it may be said that opens a road Tiao Xin.Fourth, the purity is high of preparation, quality are guaranteed.Fifth, this method has
The secondary pollution for avoiding petroleum organic chemical industry's deep processing enterprise of effect, potentiality are found in primary emission, and to eat, dry deep-frying is net, becomes
Waste be changed into values, eventually becomes valuable silver nitrate and six water nitric acid calcium products, creates considerable economic benefit.
Specific embodiment
Embodiment
A kind of silver nitrate catalyst devil liquor recovery described in the present embodiment utilizes technique, includes the following steps:
1) taking catalyst silver content is the waste silver catalyst and its carrier waste residue that 15%, three two calcium contents of oxidation are 85%
500 kilograms prepare silver nitrate and six water calcium nitrate by waste silver catalyst and its carrier waste residue (in terms of silver oxide) and nitric acid solution with
Pure mass ratio 1: 0.78 reacts in corrosion resistant reactor, starts blender, is chemically reacted, reaction generate silver nitrate and
The mixed solution of calcium nitrate, filtering obtain clear filtrate and a small amount of impurity filter cake of silver nitrate and calcium nitrate, impurity are filtered
Cake sends to burning or burial；
2) the clear filtrate of the silver nitrate of above-mentioned acquisition and calcium nitrate is sent into vacuum distillation device and is evaporated under reduced pressure,
Cooling, Crystallization Separation is ejected when being condensed into saturated solution to be precipitated first according to the difference of silver nitrate and calcium nitrate freezing point
It is silver nitrate, nine water calcium nitrate crystal is just precipitated according to nine crystallization waters that conversion evaporation reaches calcium nitrate later, through converting
If water shortage can be filled to the amount of nine crystallizations water, then washed, dry, acquisition nine water calcium nitrate crystal and 118.4
Kilogram nitric acid silver products；
3) nine water calcium nitrate crystal of above-mentioned acquisition are sent into drying box and are heated to 68~72 DEG C of drying, nine water calcium nitrate lose
It goes three crystallizations water to become six water calcium nitrate, obtains 563 kilogram of six water nitric acid calcium product through cooling packing.
Claims (1)
1. a kind of silver nitrate catalyst devil liquor recovery utilizes technique, it is characterized in that including the following steps:
1) waste silver catalyst and its carrier waste residue and nitric acid solution are reacted on pure mass ratio 1: 0.38~1.42 corrosion resistant
In reactor, blender is started, is chemically reacted, reaction generates the mixed solution of silver nitrate and calcium nitrate, and filtering obtains nitre
Clear filtrate and a small amount of impurity filter cake of sour silver and calcium nitrate；
2) the clear filtrate of the silver nitrate of above-mentioned acquisition and calcium nitrate is sent into vacuum distillation device and is evaporated under reduced pressure, is concentrated
Cooling, Crystallization Separation is ejected when at saturated solution, according to the difference of silver nitrate and calcium nitrate freezing point, what is be precipitated first is nitre
Nine water calcium nitrate crystal are just precipitated according to nine crystallization waters that conversion evaporation reaches calcium nitrate later in sour silver, if through conversion
Water shortage can be filled to the amount of nine crystallizations water, then washed, dry, nine water calcium nitrate crystal of acquisition and silver nitrate production
Product；
3) nine water calcium nitrate crystal of above-mentioned acquisition are sent into drying box and are heated to 68~72 DEG C of drying, nine water calcium nitrate lose three
A crystallization water becomes six water calcium nitrate, obtains six water nitric acid calcium products through cooling packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711206438.5A CN109835933A (en) | 2017-11-27 | 2017-11-27 | A kind of silver nitrate catalyst devil liquor recovery utilizes technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711206438.5A CN109835933A (en) | 2017-11-27 | 2017-11-27 | A kind of silver nitrate catalyst devil liquor recovery utilizes technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109835933A true CN109835933A (en) | 2019-06-04 |
Family
ID=66880288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711206438.5A Pending CN109835933A (en) | 2017-11-27 | 2017-11-27 | A kind of silver nitrate catalyst devil liquor recovery utilizes technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109835933A (en) |
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2017
- 2017-11-27 CN CN201711206438.5A patent/CN109835933A/en active Pending
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Application publication date: 20190604 |